Plunger-barrel



W. F. CUMMINS.

PLUNGER BARREL APPLICATION FILED JULY 22, 1919.

Patented Dec. 2, 1919.

UNITED STATES PATENT orFIoE.

WILLIAM FLOYD CUMMINS, OF OBLONG, ILLINOIS.

' PLUNGEBFBARREL.

Specification of LettersPatent.

Patented Dec.'2, 1919.

Application filed July 22, 1919. Serial No. 812,542.

- make and use the same, reference being had to the accompanying drawings, and .to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in plunger working barrel pumps for use in oil wells. The invention consists essentially in the provision of a plunger barrel pump having annular recesses spaced apart on the inner surface of the barrel and adapted to contain a lubricant serving as packing, dispensing with the use of leather cups to produce an efiicient suction and outlasting the usual packing and dispensing with the necessity of pulling the rods and tubing to be packed.

The invention consists of further various details of construction, combination and arrangement of parts which will be hereinafter fully described, shown in the accompanying drawings and then specifically defined in the appended claim.

I illustrate my invention in the accompanying drawings which, with the letters of reference marked thereon, form a part of this application, and in which:

Figure 1 is a side elevation of the apparatus assembled.

Fig. 2 is a view of the parts disassembled, and

Fig. 3 is a sectional view longitudinally throu h the arrangement shown in Fig. 1.

Re erence now being had to the details of the drawin by numerals:

1 and 2 designate tubular sections having threaded connections at 3 one with the other, and the inner surface of the part 1 is provided with annular recesses 4 spaced apart at distances substantially three inches and which are adapted to contain a lubricant and dispensing with the usual packing tubes for this purpose, which frequently become worn and have to be replaced. Fitted within the shell 2 is a valve cage 5 having a ball valve-6 therein, and 7 is a lower plunger valve seat container and which is connected to the lower valve body 8, which in turn has threaded connection with a series of cup rings 9 between which are the leather cups 10, and 11 designates a perforated valve casing in which is positioned a ball valve 12 interposed between the same and the lowermost of the several cups.

At the upper end of the tubular shell 1 is a sand cup 13, held in place by means of a cup follower 14. v

Mounted to have a reciprocating movement within the tubular shells 1 and 2 is a tubular barrel portion 15 having threaded connection at its lower end with a valve cage 16, and 17 is a ball adapted to-have a seat within. the cage 16, and also when it is at its lowest limit engages a seat at the upper end of the member 18, which latter has threaded "connection with threads in the cage 16.

The upper end of the tubular barrel portion 15 has threaded connection with the member 19 having a valve seat 20 in its upper'end and its lower end is provided with oppositely disposed notches 21 designed to engage the lugs 22 of the cup follower 14 to hold the plunger from turning in screwing up the rods in case they should be unscrewed while inoperation. A valve cage 23 has threaded connection with the member 20 and its upper end is threaded as at 24 for connection with the pump rod.

When the parts are assembled in the manner shown in Fig. 1 of the drawings, the liquid will be drawn through the barrel portion 15 by reci rocating the latter, eliminating all possibi ity of sand or loose material from coming-in contact with the working parts. It will be understood that the lower valve with the leather cups thereon are adapted to seat in an old barrel already. installed in the well, or a seat specially made for seating the lower end of the valve, comprising the lower valve, the two tubes 1 and 2, and the sand cup follower. cup in this manner will be set out against the tubing and prevent any foreign sub stance from settling around the tubes which The sand the interior the pump and dispense with the necessity of disassembling and replacing packing, as is commonly necessary with oil pumping apparatus.

(hat I claim to be new is:

A plunger Working barrel comprising an outer barrel portion made up of two sections having threaded connection and provided with annular recesses upon its inner surface, a sand cup upon one of said sections, and a cup follower, lugs projecting therefrom at points diametrically opposite, a tubular shell movable through said sections, a memher fastened to said shell and having a valve seat at its upper end, and oppositely disposed notches in its lower end adapted to engage said lugs to hold the connected parts from turning when thus interlocked, a valve cage having threaded connection with said valve seat at its upper end and having threads for connection to a pump rod, a plunger valve seat container, and cups secured to the lower end of said tubular shell.

In testimony whereof I hereunto affix my signature.

WILLIAM FLOYD CUMMINS. 

